<template>
  <div class="list" ref='wrapper'>
    <div>
      <div class="area">
        <div class="title border-topbuttom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for='item of hotCities'
            :key='item.id'
            @click='handleCityClick(item.name)'>
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for='(item,key) of cities' :key="key" :ref='key'>
        <div class="title border-topbuttom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for='innerItem of item'
            :key="innerItem.id"
            @click='handleCityClick(innerItem.name)'>
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState, mapMutations } from 'vuex'
import Bscroll from 'better-scroll'
export default{
  name: 'CityList',
  props: {
    hotCities: Array,
    cities: Object,
    letter: String
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  computed: {
    ...mapState(['city'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color:#ccc
    &:after
      border-color:#ccc
  .border-bottom
    &:before
      border-color:#ccc
  .list
    overflow:hidden
    position:absolute
    top:1.58rem
    left:0
    right:0
    bottom:0
  .title
    line-height:.54rem
    background:#eee
    padding-left:.2rem
    font-size:.26rem
    color:#666
  .button-list
    padding:.1rem .6rem .1rem .1rem
    overflow:hidden
    .button-wrapper
      float:left
      width:33.33%
      .button
        margin:.1rem
        padding: .1rem 0
        text-align:center
        border:.02rem solid #ccc
        border-radius:.06rem
  .item-list
    .item
      line-height:.76rem
      padding-left:.2rem
</style>
